KR102401965B1 - Reflective display device and method of manufacturing the same - Google Patents

Abstract

Disclosed is a reflective liquid crystal display capable of realizing color similar to real paper. A reflective liquid crystal display according to an embodiment of the present invention includes a first substrate and a second substrate facing each other, a liquid crystal layer disposed between the first substrate and the second substrate, and disposed on the first substrate, a plurality of gate lines and a plurality of data lines intersecting each other to define a unit pixel, a reflective layer disposed on the gate line and the data line, and a color filter disposed on the reflective layer, wherein the color filter is red a color filter, a green color filter, and a blue color filter, wherein an area of the blue color filter is greater than an area of the red color filter and an area of the green color filter, and the blue color filter includes a first pixel and the first pixel is disposed in the second pixel adjacent to .

Description

Reflective liquid crystal display device and manufacturing method thereof

The present invention relates to a reflective liquid crystal display device and a method for manufacturing the same.

In general, a liquid crystal display panel includes a lower substrate on which a pixel electrode is formed, an upper substrate on which a common electrode is formed, and a liquid crystal layer interposed between the lower substrate and the upper substrate. When a voltage is applied to the pixel electrode and the common electrode, the arrangement of the liquid crystal molecules of the liquid crystal layer is changed, and accordingly, the transmittance of light is adjusted to display an image.

A liquid crystal display device is a light-receiving type display device that does not emit light by itself. Accordingly, a general transmissive liquid crystal display device includes a backlight assembly that provides light to the liquid crystal display panel. However, the backlight assembly has a problem of not only high power consumption, but also increasing the thickness and weight of the device. In particular, portable devices such as electronic books and electronic newspapers require thin thickness, light weight, and low power consumption. Therefore, the power consumption or weight of the backlight assembly as described above may lower the competitiveness of the liquid crystal display.

Unlike the transmissive type liquid crystal display, the reflective liquid crystal display controls the transmittance of light by reflecting natural light or external artificial light without a separate backlight assembly using a reflecting plate. Therefore, it may be a more suitable display device for an e-book.

On the other hand, since the reflector used in the conventional reflective liquid crystal display has reddish and yellowish reflective characteristics compared to white paper, it may give a different feeling to the user from looking at the paper.

SUMMARY OF THE INVENTION An object of the present invention is to provide a reflective liquid crystal display capable of realizing a color similar to that of real paper and a method for manufacturing the same.

A reflective liquid crystal display according to an exemplary embodiment of the present invention for solving the above-described problems includes a first substrate and a second substrate facing each other. A liquid crystal layer disposed between the first substrate and the second substrate. a plurality of gate lines and a plurality of data lines disposed on the first substrate and arranged to cross each other to define a unit pixel. a reflective layer disposed on the gate line and the data line. and a color filter disposed on the reflective layer, wherein the color filter includes a red color filter, a green color filter, and a blue color filter, and an area of the blue color filter is an area of the red color filter and the green color filter. is larger than an area of , and the blue color filter is disposed to extend to the first pixel and the second pixel adjacent to the first pixel.

Pixels defined by the plurality of gate lines and the plurality of data lines may have uniform sizes.

The blue color filter may overlap two or more thin film transistors.

An area of the red color filter may be the same as an area of the green color filter.

Meanwhile, the color filter may further include a white color filter, and an area of the blue color filter may be larger than an area of the white color filter.

Here, an area of the red color filter and an area of the green color filter may be larger than an area of the white color filter.

Meanwhile, the color filter may further include a white color filter, and an area of the blue color filter may be the same as an area of the white color filter.

Meanwhile, the color filter further includes a white color filter, wherein the red color filter, the green color filter, the blue filter, and the white color filter are arranged in two rows and two columns, and the blue color filter and the white color filter Color filters may be placed in the same row.

Meanwhile, it may further include a first organic layer and a second organic layer, wherein the reflective layer is disposed on the first organic layer, and the second organic layer is disposed on the color filter.

The light blocking member may further include a light blocking member disposed on the second substrate, wherein the light blocking member is disposed in an area corresponding to a boundary of the color filter.

Here, it may further include a common electrode disposed on the second substrate, wherein the common electrode may be electrically connected to the reflective layer.

A method of manufacturing a reflective liquid crystal display according to an exemplary embodiment of the present invention for solving the above-described problems includes forming a plurality of gate lines and a plurality of data lines that are arranged to cross each other on a first substrate and define a unit pixel. step. forming a reflective layer disposed on the gate line and the data line. forming a color filter on the reflective layer, wherein the color filter includes a red color filter, a green color filter, and a blue color filter, and an area of the blue color filter is an area of the red color filter and the green color filter. It is larger than an area of the filter, and the blue color filter is formed in a first pixel and a second pixel adjacent to the first pixel.

Pixels defined by the plurality of gate lines and the plurality of data lines may have uniform sizes.

The blue color filter may overlap two or more thin film transistors.

Meanwhile, the color filter may further include a white color filter, and an area of the blue color filter may be larger than an area of the white color filter.

Meanwhile, forming a first organic layer on the gate line and the data line. and forming a second organic layer on the color filter.

Here, the method may further include forming a pixel electrode on the second organic layer.

Meanwhile, forming a common electrode on the second substrate. and forming a light blocking member on the common electrode, wherein the light blocking member may be formed in a region corresponding to a boundary of the color filter.

Here, the method may further include forming a column spacer on the light blocking member.

Here, the light blocking member and the column spacer may be integrally formed.

The reflective liquid crystal display according to an embodiment of the present invention may realize a color similar to that of actual paper.

In addition, the method for manufacturing a reflective liquid crystal display according to an embodiment of the present invention can manufacture a liquid crystal display capable of realizing a color similar to that of actual paper.

Effects according to the embodiments of the present invention are not limited by the contents exemplified above, and more various effects are included in the present specification.

1 is a layout diagram of a reflective liquid crystal display according to an exemplary embodiment.
FIG. 2 is a cross-sectional view taken along line II-II' of FIG. 1 .
3 is a cross-sectional view taken along line III-III' of FIG. 1 .
4 is a plan view illustrating a color filter structure of a reflective liquid crystal display according to an exemplary embodiment.
5 to 17 are cross-sectional views illustrating steps of a method of manufacturing a liquid crystal display according to an exemplary embodiment of the present invention.
18 is a plan view illustrating a color filter structure of a reflective liquid crystal display according to another exemplary embodiment of the present invention.
19 and 20 are plan views illustrating a structure of a color filter of a reflective liquid crystal display according to another exemplary embodiment.
21 is a layout diagram of a reflective liquid crystal display according to another exemplary embodiment.
22 and 23 are plan views illustrating a structure of a color filter of a reflective liquid crystal display according to another exemplary embodiment.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Sizes and relative sizes of layers and regions in the drawings may be exaggerated for clarity of description.

Reference to an element or layer “on” or “on” another element or layer includes not only directly on the other element or layer, but also with other layers or other elements intervening. include all On the other hand, reference to an element "directly on" or "directly on" indicates that no intervening element or layer is interposed. “and/or” includes each and every combination of one or more of the recited items.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is a layout diagram of a reflective liquid crystal display according to an exemplary embodiment. FIG. 2 is a cross-sectional view taken along line II-II' of FIG. 1 . 3 is a cross-sectional view taken along line III-III' of FIG. 1 . 4 is a plan view illustrating a color filter structure of a reflective liquid crystal display according to an exemplary embodiment.

1 to 3 , a reflective liquid crystal display 10 according to an embodiment of the present invention includes a first substrate 100 , a second substrate 200 , and a first substrate 100 facing each other; A liquid crystal layer 300 interposed between the second substrates 200 is included.

The first substrate 102 and the second substrate 200 may include an insulating material such as transparent glass, quartz, ceramic, silicon, or transparent plastic, and may be appropriately selected according to the needs of those skilled in the art. The first substrate 100 and the second substrate 200 may be disposed to face each other.

A plurality of gate lines 102 and 104 and data lines 132 , 134 and 136 may be disposed on the first substrate 100 .

The gate wirings 102 and 104 may include a plurality of gate lines 102 and a plurality of gate electrodes 104 . The data lines 132 , 134 , and 136 may include a plurality of data lines 132 , a plurality of source electrodes 134 , and a plurality of drain electrodes 136 .

The gate wirings 102 , 104 and the data wirings 132 , 134 , and 136 are formed of an aluminum-based metal such as aluminum (Al) and an aluminum alloy, a silver-based metal such as silver (Ag) and a silver alloy, and copper (Cu) and copper. It may be made of a copper-based metal such as an alloy, a molybdenum-based metal such as molybdenum (Mo) and a molybdenum alloy, chromium (Cr), titanium (Ti), tantalum (Ta), or the like. In addition, the gate wirings 102 , 104 and the data wirings 132 , 134 , and 136 may have a multilayer structure including two conductive layers (not shown) having different physical properties. For example, one conductive layer may be made of an aluminum-based metal, a silver-based metal, or a copper-based metal, and the other conductive layer may be made of a molybdenum-based metal, chromium, titanium, tantalum, or the like. Examples of such a combination include a chromium lower film and an aluminum upper film, and an aluminum lower film and a molybdenum upper film. However, the present invention is not limited thereto, and the gate wirings 102 , 104 and the data wirings 132 , 134 , and 136 may be formed of various metals and conductors.

Each gate line 102 may extend along a boundary of a pixel in a first direction, for example, in a horizontal direction, and each data line 132 may extend in a second direction, for example, along a boundary in a vertical direction of the pixel. can The plurality of gate lines 102 and the plurality of data lines 132 may be cross-arranged to define a unit pixel. A pixel may be defined by a region surrounded by the gate line 102 and the data line 132 . Pixels defined by the plurality of gate lines 102 and the plurality of data lines 132 may have a constant/uniform size. However, this is exemplary and the present invention is not limited thereto.

At least one gate electrode 104 is connected to each of the gate lines 102 for each pixel. The gate electrode 104 may be branched from the gate line 102 toward the semiconductor layer 122 or may be formed by extending the gate line 102 . However, the present invention is not limited thereto, and the gate electrode 104 may be defined in a region overlapping the semiconductor layer 122 on the extension path of the gate line 102 .

At least one source electrode 134 is connected to each of the data lines 132 for each pixel. The source electrode 134 may be branched from the data line 132 toward the semiconductor layer 122 or may be formed by extending the data line 132 . However, the present invention is not limited thereto, and the source electrode 104 may be defined in a region overlapping the semiconductor layer 122 on the extension path of the data line 132 . The drain electrode 136 may be disposed to be spaced apart from the source electrode 104 with respect to the semiconductor layer 122 , and a contact hole 136a formed to pass through the first passivation layer 142 and the second passivation layer 172 . ) may be electrically connected to the pixel electrode 192 .

A gate insulating layer 112 may be disposed between the gate lines 102 and 104 and the data lines 132 , 134 and 136 . In an embodiment, the gate insulating layer 112 may be disposed on the gate lines 102 and 104 , and the data lines 132 , 134 , and 136 may be disposed on the gate insulating layer 112 . The gate insulating layer 112 may be formed of, for example, silicon nitride (SiNx), silicon oxide (SiO2), silicon oxynitride (SiON), or a stacked layer thereof. The gate insulating layer 112 may serve to maintain insulation between the gate wirings 102 and 104 and conductive thin films such as the data line 132 positioned thereon.

The semiconductor layer 122 is disposed on the gate insulating layer 112 and may be made of, for example, hydrogenated amorphous silicon or polycrystalline silicon. The semiconductor layer 122 is disposed to at least partially overlap the gate electrode 104 . The semiconductor layer 122 together with the gate electrode 104 , the source electrode 134 , and the drain electrode 136 constitutes a thin film transistor. In the exemplary embodiment of FIG. 1 , the thin film transistor is disposed at a predetermined position for each pixel, but the present invention is not limited thereto, and the thin film transistor may be disposed in a zig-pole shape along the pixel column.

The semiconductor layer 122 may have various shapes such as an island shape or a linear shape, and FIG. 3 illustrates a case in which the semiconductor layer 122 is formed in an island shape, but is not limited thereto. When the semiconductor layer 122 is linearly formed, although not shown separately, the semiconductor layer 122 may overlap the data lines 132 , 134 , and 136 .

An ohmic contact layer 124 made of n+ hydrogenated amorphous silicon doped with a high concentration of n-type impurities may be disposed on the semiconductor layer 122 . The ohmic contact layer 124 is positioned between the lower semiconductor layer 122 and the upper source electrode 134 and drain electrode 136 to reduce contact resistance. Similar to the semiconductor layer 122 , the ohmic contact layer 124 may have various shapes, such as an island shape or a linear shape. When the semiconductor layer 122 is an island shape, the ohmic contact layer 124 may also have an island shape, and when the semiconductor layer 122 is linear, the ohmic contact layer 124 may also be linear. Unlike the semiconductor layer 122 , the ohmic contact layer 124 has a space in which the source electrode 134 and the drain electrode 136 face each other and is spaced apart, so that the lower semiconductor layer 122 may be exposed. . In the semiconductor layer 122 , a channel may be formed in a region where the source electrode 134 and the drain electrode 136 face each other and are spaced apart from each other.

When the gate electrode 104 receives the gate-on signal to form a channel in the semiconductor layer 122 , the thin film transistor is turned on and the drain electrode 136 receives a data signal from the source electrode 134 and transmits the data signal to the pixel electrode 192 . ) can be passed to

A first passivation layer 142 is disposed on the data lines 132 , 134 , and 136 and the exposed semiconductor layer 122 . A contact hole 136a exposing at least a portion of the drain electrode 136 may be formed in the first passivation layer 142 and the first organic layer 152 to be described later. At least a portion of the drain electrode 136 exposed through the contact hole 136a may contact the pixel electrode 192 . Through this, the drain electrode 136 and the pixel electrode 192 may be electrically connected/connected.

In some embodiments, the contact hole 136a may be implemented to expose only a portion of the drain electrode 136 as shown in FIGS. 1 to 3 . However, this is only an example, and the contact hole 136a may be implemented in such a way that a portion of the drain electrode 136 and a portion of the gate insulating layer 112 are exposed.

The first passivation layer 142 is formed of, for example, an inorganic material such as silicon nitride or silicon oxide, plasma enhanced chemical vapor deposition (PECVD), a-Si:C:O, a-Si:O :F and the like may be included.

A first organic layer 152 may be disposed on the first passivation layer 142 . The first organic layer 152 has excellent planarization characteristics and may include a material having photosensitivity. The first organic layer 152 includes a contact hole 136a exposing at least a portion of the drain electrode 136 .

A reflective layer 162 may be disposed on the first organic layer 152 . The reflective layer 162 may serve to reflect light incident from the outside. To this end, the reflective layer 162 may be implemented by including a highly reflective metal, for example, a silver (Ag) or aluminum (Al) metal film, but is not limited thereto. The reflective layer 162 may be formed by stacking two or more metal films or reflective films.

The reflective layer 162 may include an opening for connection between the pixel electrode 192 and the drain electrode 136 . An opening of the reflective layer 162 may be formed for each pixel. The size of the upper opening may be larger than the size of the contact hole 136a. In this case, as shown in FIG. 1 , the contact hole 136a may be positioned in the opening formed in the reflective layer 162 . The reflective layer 162 may be integrally formed over the entire pixel area surrounded by the gate line 102 and the data line 132 except for the upper opening. Since the gate line 102 and the data line 132 are covered by the reflective layer 162 , a loss in the aperture ratio due to the gate line 102 and the data line 132 may not occur or may be minimized.

A constant voltage may be applied to the reflective layer 162 so that voltage fluctuations do not occur due to voltages applied to the gate line 102 and the data line 132 . For example, the reflective layer 162 may be implemented in a structure electrically connected to the common electrode 202 disposed on the second substrate 200 to apply a common voltage. A method of electrically connecting the reflective layer 162 and the common electrode 202 can be implemented through various conventionally known methods, and a detailed description thereof will be omitted.

Color filters 172R, 172G, 172B, and 172W are disposed on the reflective layer 162 . The color filters 172R, 172G, 172B, and 172W are R (red) color filters (red color filters) 172R, G (green) color filters (green color filters) 172G, B (blue) color filters (blue) color filter) 172B, and a white (W) color filter (white color filter) 172W. Each of the R, G, B, and W color filters 172R, 172G, 172B, and 172W may be disposed in one or two or more pixels. The color filters 172R, 172G, 172B, and 172W may include a photosensitive organic material including a pigment.

The color filters 172R, 172G, 172B, and 172W may include openings for connection between the pixel electrode 192 and the drain electrode 136 . The size of the upper opening may be larger than the size of the contact hole 136a. In this case, the contact hole 136a may be located in the opening formed in the R, G, B, and W color filters 172R, 172G, 172B, and 172W. Furthermore, the openings of the color filters 172R, 172G, 172B, and 172W are larger than the openings of the reflective layer 162, and the openings of the reflective layer 162 may be located within the openings of the color filters 172R, 172G, 172B, and 172W. , but is not limited thereto.

At least a portion of the color filters 172R, 172G, 172B, and 172W may be disposed to overlap the pixel electrode 192 . Light incident from the outside is reflected by the reflective layer 162, and the above light passes through the color filters 172R, 172G, 172B, and 172W and is reflected, corresponding to the color filters 172R, 172G, 172B, and 172W. Color may be displayed.

The structure of the color filters 172R, 172G, 172B, and 172W will be described in detail below.

A second organic layer 182 may be disposed on the color filters 172R, 172G, 172B, and 172W. The second organic layer 182 has excellent planarization characteristics and may include a material having photosensitivity. The second organic layer 182 may include an opening for connection between the pixel electrode 192 and the drain electrode 136 . The size of the opening may be larger than the size of the contact hole 136a . In this case, the contact hole 136a may be positioned in the opening formed in the second organic layer 182 . A second organic layer 182 may be disposed on the color filters 172R, 172G, 172B, and 172W to flatten the steps of the R, G, B, and W color filters 172R, 172G, 172B, and 172W. The second organic layer 182 may cover the entire color filters 172R, 172G, 172B, and 172W. That is, the color filters 172R, 172G, 172B, and 172W may not be exposed by being covered by the second organic layer 182 . However, this is an example and the present invention is not limited to this structure.

As shown in FIG. 2 , the second organic layer 182 may include a portion in direct contact with the upper surface of the first organic layer 152 . A portion of the upper surface of the first organic layer 152 may not be covered by the second organic layer 182 as shown in FIG. 2 . In other words, the inner surface of the contact hole 136a formed in the first organic layer 152 and the second organic layer 182 may have a step shape. However, this structure is exemplary, and the entire upper surface of the first organic layer 152 may be implemented as a structure in which the second organic layer 182 is covered. In addition, if at least a portion of the drain electrode 136 can be exposed through the contact hole 136a , the second organic layer 182 covers the entire inner surface of the contact hole 136a formed in the first organic layer 152 . may be implemented as

A pixel electrode 192 may be disposed on the second organic layer 182 . The pixel electrode 192 may be disposed for each unit pixel. The pixel electrode 192 may not overlap the thin film transistor. The pixel electrode 192 may be implemented with a uniform/constant size as shown in FIG. 1 . More specifically, the pixel electrode 192 may be implemented with a constant/uniform size regardless of the size of the color filters 172R, 172G, 172B, and 172W. In other words, when viewed from a plan view, the area of the pixel electrode 192 disposed in each unit pixel may have a constant value. However, this is exemplary and the present invention is not limited thereto.

A portion of the pixel electrode 192 is also disposed inside the contact hole 136a. A portion of the pixel electrode 192 disposed inside the contact hole 136a may be in contact with the drain electrode 136 to be electrically connected thereto. Although not shown, when a portion of the drain electrode 136 and a portion of the gate insulating layer 112 are exposed by the contact hole 136a , the pixel electrode 192 may include a portion directly contacting the gate insulating layer 112 . can

When a data voltage is applied to the pixel electrode 192 , an electric field is formed together with the common electrode 202 to control the alignment direction of liquid crystal molecules included in the liquid crystal layer 300 . The pixel electrode 192 may include, but is not limited to, a transparent conductive material such as ITO or IZO.

A common electrode 202 , a light blocking member 212 , and a column spacer 214 may be disposed on the second substrate 200 .

The common electrode 202 may be disposed on a surface of the second substrate 200 facing the first substrate 100 . The common electrode 202 may be integrally disposed over the entire pixel area. The common electrode 202 may be formed of a transparent conductive material such as polycrystalline, single crystal, or amorphous indium tin oxide (ITO) or indium zinc oxide (IZO). The common electrode 202 may receive a common voltage and generate an electric field together with the pixel electrode 192 to control the alignment direction of liquid crystal molecules included in the liquid crystal layer 300 .

The common electrode 202 may be implemented in a structure electrically connected to the reflective layer 162 . A method of electrically connecting the common electrode 202 and the reflective layer 162 can be implemented through various conventionally known methods, and a detailed description thereof will be omitted.

A light blocking member 212 may be disposed on the common electrode 202 . The light blocking member 192 serves to prevent light leakage. The light blocking member 212 may be disposed in an area corresponding to the boundary of each of the R color filters 172R, G color filters, B color filters 172B, and W color filters 172W. Specifically, the light blocking member 212 may be disposed in a grid shape in an area corresponding to the upper boundary. However, this is an example, and the arrangement of the light blocking member 212 in the present invention is not limited thereto. For example, it may be arranged in a line type only between the color filter rows. The light blocking member 192 may include a black organic polymer material including a black dye or a pigment, or a metal (metal oxide) such as chromium or chromium oxide.

A column spacer 214 is used to maintain a cell gap and may be formed on the light blocking member 212 as shown in FIGS. 2 and 3 . When the light blocking member 212 is disposed in a grid shape, the column spacer 214 may be disposed at a portion corresponding to an intersection point in the grid shape. Furthermore, the column spacers 214 may not be disposed at all of the above intersections, but may be disposed only at a part. However, this is an example, and the arrangement of the column spacer 214 is not limited thereto.

In some embodiments, the column spacer 214 may be formed of the same material as the light blocking member 212 . Furthermore, the column spacer 214 may be integrally formed with the light blocking member 212 . For example, the column spacer 194 and the light blocking member 192 may be formed through the same patterning process of the same material through halftone mask or slit mask exposure.

2 and 3 , a case in which the light blocking member 212 is disposed on the second substrate 200 is exemplified, but the present invention is not limited thereto, and may be disposed on the first substrate 100 . For example, the light blocking member 192 may be formed on the second organic layer 182 of the first substrate 100 on each of the R color filters 172R, G color filters, B color filters 172B, and W color filters 172W. ) may be disposed in an area corresponding to the boundary.

An alignment layer (not shown) may be disposed on one surface of the first substrate 100 and one surface of the second substrate 200 facing the liquid crystal layer 300 , respectively. That is, an alignment layer (not shown) capable of aligning the liquid crystal layer 300 is formed on the pixel electrode 192 , the second organic layer 182 , the common electrode 202 , the light blocking member 212 , and the column spacer 214 . can be placed.

An end of the column spacer 214 may abut against the first substrate 100 .

A liquid crystal layer 300 including liquid crystal molecules (not shown) having positive dielectric anisotropy or negative dielectric anisotropy may be interposed between the first substrate 100 and the second substrate 200 .

Hereinafter, the structure of the color filters 172R, 172G, 172B, and 172W of the liquid crystal display 10 according to an embodiment of the present invention will be described in detail.

1 to 4 , in the color filters 172R, 172G, 172B, and 172W, when viewed from a plan view, the R color filter 172R and the G color filter 172G are alternately arranged in the same row. can The B color filter 172B and the W color filter 172W may be alternately and repeatedly disposed in a row different from the above row, for example, in an adjacent previous row and/or a subsequent row. The combination C1 of one R, G, B, and W color filter 172R, 172G, 172B, and 172W may have a quadrangular shape when viewed from a plan view. In other words, the combination C1 of the above one R, G, B, and W color filters 172R, 172G, 172B, and 172W may be arranged in an arrangement of 2 rows and 2 columns as shown in FIG. 4 .

Combination units of the above one R, G, B, and W color filters 172R, 172G, 172B, and 172W may be alternately and repeatedly disposed. Specifically, the combination units of the above one R, G, B, and W color filters 172R, 172G, 172B, and 172W may be repeatedly arranged in the row direction. A combination (C1) of one of the above R, G, B, and W color filters (172R, 172G, 172B, 172W) and another R, G, B, W color filter disposed below (or above) adjacent thereto The combination C2 of (172R, 172G, 172B, and 172W) may be staggered to each other as shown in FIG. 4 . However, the arrangement of the combination of the R, G, B, and W color filters 172R, 172G, 172B, and 172W shown in FIG. 4 is exemplary, and the present invention may be applied to various other arrangements.

Each of the R, G, B, and W color filters 172R, 172G, 172B, and 172W may include an opening for connection between the pixel electrode 192 and the drain electrode 136 . The R, G, B, and W color filters 172R, 172G, 172B, and 172W may be sequentially disposed as shown in FIGS. 2 to 4 . That is, the structure may include a structure in which a boundary of a color filter is in contact with a boundary of another color filter. Accordingly, the R, G, B, and W color filters 172R, 172G, 172B, and 172W may be continuously disposed over the entire pixel area surrounded by the gate line 102 and the data line 132 except for the upper opening.

When viewed from a plan view, the area of the B color filter 172B is the area of the R color filter 172R in the combination C1 of one of the R, G, B, and W color filters 172R, 172G, 172B, and 172W. , an area of the G color filter 172G, and an area of the W color filter 172W may be larger. When viewed from a plan view, the area of the R color filter 172R and the area of the G color filter 172G may be larger than the area of the W color filter 172W. When viewed from a plan view, the area of the R color filter 172R and the area of the G color filter 172G in the combination of the above one R, G, B, and W color filters 172R, 172G, 172B, and 172W are the same can

The area ratio of the R, G, B, and W color filters 172R, 172G, 172B, and 172W may be determined in consideration of the reflection characteristics of the reflective layer 162 . For example, the area ratio of the R, G, B, and W color filters 172R, 172G, 172B, and 172W may be approximately 1:1:1.2:0.8. That is, as the area of the B color filter 172B is relatively increased, the area of the W color filter 172W may be relatively small. As shown in FIG. 1 , when the pixel electrode 192 has a constant/uniform size irrespective of the size of each color filter 172R, 172G, 172B, and 172W, the B color filter 172B is a W color filter It may be implemented in an extended form to a pixel area corresponding to (172W). That is, the B color filter 172B may be disposed in two pixels adjacent to each other. More specifically, the B color filter 172B extends/extends to a pixel (first pixel) corresponding to the B color filter 172B and a pixel (second pixel) corresponding to the W color filter 172W adjacent thereto. can be placed. Accordingly, as shown in FIG. 2 , the B color filter 172B may have a structure overlapping with at least a portion of the thin film transistor corresponding to the W color filter 172W. Also, the B color filter 172B overlaps the data line 132 disposed between the pixel electrode 192 corresponding to the B color filter 172B and the pixel electrode 192 corresponding to the W color filter 172W. It may be a structure that becomes

3 and 4 , when the area of the R color filter 172R and the area of the G color filter 172G are implemented to be the same, the R color filter 172R and the G color filter 172G have the R color It may have a structure that abuts in an overlapping region of the data line 132 disposed between the pixel electrode 192 corresponding to the filter 172R and the pixel electrode 192 corresponding to the G color filter 172G.

1 to 4 , the R color filter 172R and the B color filter 172B include the pixel electrode 192 corresponding to the R color filter 172R and the pixel electrode 192 corresponding to the B color filter 172B. The structure may be in contact with the overlapping regions of the gate lines 102 disposed between the 192 .

1 to 4 , the B color filter 172B and the G color filter 172G include a pixel electrode 192 corresponding to the G color filter 172G and a pixel electrode 192 corresponding to the W color filter 172W. In an overlapping region of the gate line 102 disposed between the 192 , a structure in contact with each other may be included.

1 to 4 , the G color filter 172G and the W color filter 172W include the pixel electrode 192 corresponding to the G color filter 172G and the pixel electrode 192 corresponding to the W color filter 172W. The structure may be in contact with the overlapping regions of the gate lines 102 disposed between the 192 .

The reflective layer 162 of the reflective liquid crystal display 10 may have reddish and yellowish reflective characteristics compared to white paper. Accordingly, it is possible to give the user a different feeling from looking at the paper. As shown in FIG. 4 , the area of the B color filter 172B is the area of the R color filter 172R and the area of the G color filter 172G. As it has a wider structure, the reddish and yellowish reflective characteristics of the reflective layer 162 may be alleviated, and thus a color similar to that of actual paper may be realized.

In addition, the luminance of the light reflected through the W color filter 172W may be greater than the luminance of the light reflected through the R color filter 172R, the G color filter 172G, and the B color filter 172B. Accordingly, by making the area of the W color filter 172W smaller than that of the R color filter 172R, the G color filter 172G, and the B color filter 172B, the reflective layer 162 has a reddish look. , it is possible to effectively alleviate the yellowish reflection characteristics.

Next, a method of manufacturing the reflective liquid crystal display 10 according to an embodiment of the present invention as described above will be described.

5 to 17 are cross-sectional views illustrating steps of a method of manufacturing a liquid crystal display according to an exemplary embodiment of the present invention.

First, referring to FIGS. 1 , 2 and 5 , the gate wirings 102 and 104 are formed on the first substrate 100 .

A first metal layer (not shown) is formed on the first substrate 100 including a transparent material, for example, glass and quartz. The first metal layer (not shown) may be formed of aluminum, copper, silver, molybdenum, chromium, titanium, tantalum, or an alloy thereof, and may be formed of two or more layers having different physical properties. The first metal layer (not shown) is deposited by, for example, a sputtering process. Then, the first metal layer (not shown) is patterned by a photolithography process using a first exposure mask to form the gate wirings 102 and 104 including the gate line 102 and the gate electrode 104 . The gate electrode 104 may have a protrusion shape branched from the gate line 102 .

Next, referring to FIG. 6 , a gate insulating layer 112 is formed on the gate wirings 102 and 104 . The gate insulating layer 112 may be formed through a plasma enhanced chemical vapor deposition (PECVD) method, and may include silicon nitride (SiNx) or silicon oxide (SiO2).

Next, referring to FIG. 7 , the semiconductor layer 122 and the ohmic contact layer 124 are formed on the gate insulating layer 112 . The semiconductor layer 122 may be formed using hydrogenated amorphous silicon or polycrystalline silicon. The semiconductor layer 122 and the ohmic contact layer 124 may be formed through a photolithography process.

Next, referring to FIG. 8 , data lines 132 , 134 , and 136 including a data line 132 that crosses the gate line 102 to define a unit pixel, and a source electrode 134 and a drain electrode 136 . ) is formed on the gate insulating layer 112 , the semiconductor layer 122 , and the ohmic contact layer 124 through a photolithography process. Like the gate wires 102 and 104 , the data wires 132 , 134 , and 136 may be formed of aluminum, copper, silver, molybdenum, chromium, titanium, tantalum, an alloy thereof, or the like, and may include two or more materials having different physical properties. It can be formed in layers.

In the present embodiment, although the semiconductor layer 122 and the ohmic contact layer 124 and the data lines 132 , 134 , and 136 are formed through a separate photo-visual process, the present embodiment is not limited thereto, and the semiconductor layer 122 is not limited thereto. ), the ohmic contact layer 124 , and the data lines 132 , 134 , and 136 may be formed through a photolithography process using a single mask. In this case, residues of the semiconductor layer 122 and the ohmic contact layer 124 may remain under the data line 132 . In other words, the semiconductor layer 122 and the ohmic contact layer 124 may be implemented linearly. The semiconductor layer 122 together with the gate electrode 104 , the source electrode 134 , and the drain electrode 136 constitutes a thin film transistor and may form a channel.

Next, referring to FIG. 9 , a first passivation layer 142-1 is formed on the first substrate 102 on which the thin film transistor is formed. The first passivation layer 142-1 may be formed of, for example, an inorganic material such as silicon nitride or silicon oxide, a-Si:C:O, plasma enhanced chemical vapor deposition (PECVD), It may be formed by including a material such as a-Si:O:F.

Next, with continued reference to FIG. 9 , a first organic layer 152-1 is formed on the first passivation layer 142-1. The first organic layer 152-1 has excellent planarization characteristics and may be formed of a material having photosensitivity. The first organic layer 152-1 may be formed by a spin coating method or a slit coating method, or may be formed by simultaneously using a spin coating method and a slit coating method.

Next, referring to FIG. 10 , a contact hole 136a exposing at least a portion of the drain electrode 136 is formed in the first passivation layer 142-1 and the first organic layer 152-1. Specifically, the first organic layer 152 is formed by forming a contact hole 136a in the first organic layer 152-1, and then a contact hole 136a is formed in the first passivation layer 142-1 to form a second contact hole 136a. 1 A protective layer 142 may be formed.

Next, referring to FIG. 11 , a reflective layer 162 is formed on the first organic layer 152 . The reflective layer 162 may serve to reflect light incident from the outside. To this end, the reflective layer 162 may be formed of a metal with high reflectivity, for example, silver (Ag) or aluminum (Al) metal film/reflective film, but is not limited thereto.

The reflective layer 162 may have a multilayer structure including two conductive layers having different physical properties. For example, the process of forming the reflective layer 162 includes the process of forming a metal film/reflective film including silver (Ag) and/or aluminum (Al) on the first organic layer 152 and the process of forming the metal film/reflective film on the first organic layer 152 . and forming a polycrystalline, single-crystal, or amorphous transparent conductive film such as indium tin oxide (ITO) or indium zinc oxide (IZO) thereon. In this case, since the conductive layer can prevent the metal layer/reflective layer from being oxidized, it can be more advantageous to extend the lifespan of the display device compared to the case where the reflective layer 162 is made of only the metal layer/reflective layer.

An opening for a connection between the pixel electrode 192 and the drain electrode 136 may be formed in the reflective layer 162 for each pixel. The size of the upper opening may be larger than the size of the contact hole 136a. In this case, as shown in FIG. 1 , the contact hole 136a may be positioned in the opening formed in the reflective layer 162 . The reflective layer 162 may be integrally formed over the entire pixel area surrounded by the gate line 102 and the data line 132 except for the upper opening. Since the gate line 102 and the data line 132 are covered by the reflective layer 162 , there may be no loss in the aperture ratio due to the gate line 102 and the data line 132 .

The reflective layer 162 may be formed so that a constant voltage is applied. For example, the reflective layer 162 may be implemented in a structure electrically connected to the common electrode 202 on the second substrate 200 . A method of electrically connecting the reflective layer 162 and the common electrode 202 can be implemented through various conventionally known methods, and a detailed description thereof will be omitted. Accordingly, voltage fluctuations in the reflective layer 162 may not occur due to the voltage applied to the gate line 102 and the data line 132 .

Next, referring to FIG. 12 , color filters 172R, 172G, 172B, and 172W are formed on the reflective layer 162 . The color filters 172R, 172G, 172B, and 172W include an R (red) color filter 172R, a G (green) color filter 172G, a B (blue) color filter 172B, and a W (white) color filter ( 172 W). The color filters 172R, 172G, 172B, and 172W may be formed of a photosensitive organic material including a pigment. The color filters 172R, 172G, 172B, and 172W may be formed by a photolithography process or an inkjet printing method, and various other methods may also be applied. An opening for connection between the 192 and the drain electrode 136 may be included. The size of the upper opening may be larger than the size of the contact hole 136a. In this case, the contact hole 136a may be located in the opening formed in the color filters 172R, 172G, 172B, and 172W.

2 to 4 and 12 , when the color filters 172R, 172G, 172B, and 172W are viewed from a plan view, the R color filter 172R and the G color filter 172G are alternately arranged in the same row. It may be a structure formed repeatedly. In a row different from the above row, the B color filter 172B and the W color filter 172W may have a structure formed by alternately repeating. The combination C1 of one R, G, B, and W color filter 172R, 172G, 172B, and 172W may have a quadrangular shape when viewed from a plan view. The R, G, B, and W color filters 172R, 172G, 172B, and 172W may have a structure formed by alternately repeating the combination unit. Specifically, the R, G, B, and W color filters 172R, 172G, 172B, and 172W may have a structure repeatedly formed in the row direction as a combination unit. A combination C1 of one of the above R, G, B, and W color filters 172R, 172G, 172B, and 172W and another R, G, B, W color filter 172R disposed above/under adjacent thereto , 172G, 172B, and 172W) may have a structure formed to cross each other as shown in FIG. 4 .

The R, G, B, and W color filters 172R, 172G, 172B, and 172W may be continuously formed as shown in FIGS. 2 to 4 . Accordingly, the R, G, B, and W color filters 172R, 172G, 172B, and 172W may be continuously formed over the entire pixel area surrounded by the gate line 102 and the data line 132 except for the upper opening.

The color filters 172R, 172G, 172B, and 172W include an R (red) color filter 172R, a G (green) color filter 172G, a B (blue) color filter 172B, and a W (white) color filter ( 172W) may be formed in this order. However, this is an example and is not limited to this order. As the color filters 172R, 172G, 172B, and 172W are sequentially formed, the boundary between the color filters 172R, 172G, 172B, and 172W may have an oblique shape as shown in FIGS. 2 and 3 .

When viewed from a plan view, the area of the B color filter 172B is the area of the R color filter 172R in the combination C1 of one of the R, G, B, and W color filters 172R, 172G, 172B, and 172W. , an area of the G color filter 172G, and an area of the W color filter 172W may be larger. When viewed from a plan view, the area of the R color filter 172R and the area of the G color filter 172G may be larger than the area of the W color filter 172W. When viewed from a plan view, the area of the R color filter 172R and the area of the G color filter 172G in the combination of the above one R, G, B, and W color filters 172R, 172G, 172B, and 172W are the same can

The B color filter 172B may be implemented in an extended form to a pixel area corresponding to the W color filter 172W. Accordingly, as shown in FIG. 2 , the B color filter 172B may overlap at least a portion of the thin film transistor corresponding to the W color filter 172W. Also, the B color filter 172B may overlap the data line 132 formed between/between the pixel area corresponding to the B color filter 172B and the pixel area corresponding to the W color filter 172W.

The reflective layer 162 of the reflective liquid crystal display 10 may have reddish and yellowish reflective characteristics compared to white paper. Accordingly, it is possible to give the user a different feeling from looking at the paper. As shown in FIG. 4 , the area of the B color filter 172B is the area of the R color filter 172R and the area of the G color filter 172G. As it has a wider structure, the reddish and yellowish reflective characteristics of the reflective layer 162 may be alleviated, and thus a color similar to that of actual paper may be realized.

In addition, the luminance of the light reflected through the W color filter 172W may be greater than the luminance of the light reflected through the R color filter 172R, the G color filter 172G, and the B color filter 172B. Accordingly, by making the area of the W color filter 172W smaller than that of the R color filter 172R, the G color filter 172G, and the B color filter 172B, the reflective layer 162 has a reddish look. , it is possible to effectively alleviate the yellowish reflection characteristics.

Next, referring to FIG. 13 , a second organic layer 182 is formed on the color filters 172R, 172G, 172B, and 172W. The second organic layer 182 has excellent planarization characteristics and may be formed of a material having photosensitivity. The second organic layer 182 may be formed by a spin coating method or a slit coating method, or may be formed by simultaneously using a spin coating method and a slit coating method.

The second organic layer 182 may include an opening for connection between the pixel electrode 192 and the drain electrode 136 . The size of the upper opening may be larger than the size of the contact hole 136a. More specifically, a contact hole 136a may be positioned in the opening formed in the second organic layer 182 .

Next, referring to FIG. 14 , a pixel electrode 192 is formed on the second organic layer 182 . Specifically, the pixel electrode 192 includes the opening formed in the second organic layer 182 and the drain electrode 136 exposed through the contact hole 136a formed in the first organic layer 152 and the first passivation layer 142 . It may be formed so as to be in contact with at least a portion. Through such a contact, the pixel electrode 192 may be electrically connected/connected to the drain electrode 136 .

Referring to FIG. 15 , a common electrode 202 is formed on the second substrate 200 . The common electrode 202 may be formed of a transparent conductive material such as polycrystalline, single crystal, or amorphous indium tin oxide (ITO) or indium zinc oxide (IZO), but is not limited thereto.

Next, referring to FIG. 16 , the light blocking member 212 is formed on the common electrode 202 . In consideration of the coupling of the first substrate 100 and the second substrate 200 , the light blocking member 212 includes each R color filter 172R, G color filter, B color filter 172B, and W color filter 172W. ) may be formed in a grid shape in a region corresponding to the boundary. The light blocking member 212 may be formed using a black organic polymer material including a black dye or a pigment, or a metal (metal oxide) such as chromium or chromium oxide.

Next, continuing with reference to FIG. 16 , a column spacer 214 is formed on the light blocking member 212 . As shown in FIG. 16 , the column spacer 214 may be integrally formed with the light blocking member 212 at the same time. For example, the column spacer 214 and the light blocking member 212 may be formed of the same material through the same patterning process through exposure to a halftone mask or a slit mask. However, this is illustrative and not limited thereto.

When the light blocking member 212 is formed in a grid shape, the column spacer 214 may be formed at a portion corresponding to an intersection point in the above grid shape. However, this is exemplary and the formation position of the column spacer 214 is not limited thereto.

Referring to FIG. 17 , an alignment layer (not shown) is formed on each of the first substrate 100 and the second substrate 200 . Next, the liquid crystal layer 300 is formed by coating liquid crystal molecules (not shown) having positive dielectric anisotropy or negative dielectric anisotropy on the first substrate 100 . Next, the first substrate 100 on which the liquid crystal layer 300 is formed is combined with the second substrate 200 .

Hereinafter, a reflective liquid crystal display device according to another exemplary embodiment of the present invention will be described.

18 is a plan view illustrating a color filter structure of a reflective liquid crystal display according to another exemplary embodiment of the present invention.

The reflective liquid crystal display 12 according to another embodiment of the present invention has color filters 172R-2, 172G-2, and 172B- compared to the reflective liquid crystal display 10 described above with reference to FIGS. 1 to 4 . 2, 172W-2) configuration is different, and other configurations are the same or similar. Hereinafter, differences will be mainly described except for overlapping parts.

In this embodiment, the color filters 172R-2, 172G-2, 172B-2, and 172W-2 include the R (red) color filter 172R-2, the G (green) color filter 172G-2, and the B ( a blue) color filter 172B-2, and a W (white) color filter 172W-2. Each of the R, G, B, and W color filters 172R-2, 172G-2, and 172B-2 may be disposed to overlap one or two or more pixels, respectively.

In the embodiment of FIG. 18 , the color filters 172R-2, 172G-2, 172B-2, and 172W-2 include the R color filter 172R-2 and the B color filter 172B-2 when viewed from a plan view. It may be arranged alternately and repeatedly in the same row. In a column different from the above column, the G color filter 172G-2 and the W color filter 172W-2 may be alternately and repeatedly disposed. The combination C3 of one of the R, G, B, and W color filters 172R-2, 172G-2, 172B-2, and 172W-2 may have a quadrangular shape when viewed from a plan view. The above one R, G, B, and W color filters 172R-2, 172G-2, 172B-2, and 172W-2 may be alternately and repeatedly disposed in a combination unit. Specifically, the above one R, G, B, and W color filters 172R-2, 172G-2, 172B-2, and 172W-2 may be repeatedly arranged in the row direction in units of combination. A combination (C3) of one of the above R, G, B, and W color filters (172R-2, 172G-2, 172B-2, 172W-2) and the other R, G disposed above and below it adjacent thereto The combination of , B, and W color filters 172R-2, 172G-2, 172B-2, and 172W-2 may be alternately disposed as shown in FIG. 18 . However, the arrangement of the above R, G, B, and W color filter (172R-2, 172G-2, 172B-2, 172W-2) combination shown in FIG. 18 is exemplary, and the present invention can be applied to various other arrangements as well. Of course, it can be applied.

When viewed from a plan view, in the combination C3 of one of the above R, G, B, and W color filters 172R-2, 172G-2, 172B-2, and 172W-2, the B color filter 172B-2 The area may be larger than the area of the R color filter 172R - 2 , the area of the G color filter 172G - 2 , and the area of the W color filter 172W - 2 . When viewed from a plan view, the area of the G color filter 172G-2 and the area of the W color filter 172W-2 may be larger than the area of the R color filter 172R-2. When viewed from a plan view, the G color filter (172G-2) in the combination (C3) of one of the above R, G, B, W color filters (172R-2, 172G-2, 172B-2, 172W-2) The area and the area of the W color filter 172W-2 may be the same.

The area ratio of the R, G, B, and W color filters 172R-2, 172G-2, 172B-2, and 172W-2 may be determined in consideration of the reflection characteristics of the reflective layer 162 . For example, the area ratio of the R, G, B, and W color filters 172R-2, 172G-2, 172B-2, and 172W-2 may be approximately 0.8:1:1.2:1. That is, as the area of the B color filter 172B-2 is relatively increased, the area of the R color filter 172R-2 may be relatively small. As shown in FIG. 1 , when the pixel electrode 192 has a constant/uniform size regardless of the size of each color filter 172R-2, 172G-2, 172B-2, 172W-2, color B The filter 172B-2 may be implemented in an extended form to a pixel area corresponding to the R color filter 172R-2. Accordingly, the B color filter 172B-2 may have a structure overlapping with at least a portion of the thin film transistor corresponding to the R color filter 172R-2. In addition, the B color filter 172B-2 has a gate disposed between the pixel electrode 192 corresponding to the B color filter 172B-2 and the pixel electrode 192 corresponding to the R color filter 172R-2. It may have a structure overlapping the line 102 .

18 , the R color filter 172R-2 may not have an opening. In contrast, the B color filter 172B-2 further includes an opening for connecting the pixel electrode 192 and the drain electrode 136 of the pixel corresponding to the R color filter 172R-2, so that two openings are formed. may include

As in the embodiment of FIG. 18 , when the area of the G color filter 172G-2 and the area of the W color filter 172W-2 are the same, the G color filter 172G-2 and the W color filter 172W-2 ) abuts in the overlapping region of the gate line 102 disposed between the pixel electrode 192 corresponding to the G color filter 172G-2 and the pixel electrode 192 corresponding to the W color filter 172W-2. can be a structure.

In the embodiment of FIG. 18 , the R color filter 172R-2 and the G color filter 172G-2 are connected to the pixel electrode 192 and the G color filter 172G-2 corresponding to the R color filter 172R-2. It may have a structure in which the data lines 132 abut in an overlapping region between the corresponding pixel electrodes 192 .

18 , the B color filter 172B-2 and the G color filter 172G-2 are connected to the pixel electrode 192 and the G color filter 172G-2 corresponding to the R color filter 172R-2. In an overlapping region of the data lines 132 disposed between the corresponding pixel electrodes 192 , a structure in which they contact each other may be included.

In the embodiment of FIG. 18 , the B color filter 172B-2 and the W color filter 172W-2 are connected to the pixel electrode 192 and the W color filter 172W-2 corresponding to the B color filter 172B-2. It may have a structure in which the data lines 132 abut in the overlapping regions of the corresponding pixel electrodes 192 .

The reflective layer 162 of the reflective liquid crystal display 12 may have reddish and yellowish reflective characteristics compared to white paper. Accordingly, it is possible to give the user a different feeling from looking at the paper. As shown in FIG. 4 , the area of the B color filter 172B-2 is the area of the R color filter 172R-2, and the G color filter ( 172G-2), the reddish and yellowish reflective characteristics of the reflective layer 162 can be alleviated, so that it is possible to implement a color similar to that of actual paper.

In particular, as shown in FIG. 18 , the area of the B color filter 172B-2 is larger than that of the R color filter 172R-2 and the G color filter 172G-2, and the G color filter 172G. When the area of -2) is implemented to be larger than the area of the R color filter 172R-2, the degree of relaxation of the reddish reflection characteristic of the reflective layer 162 is yellowish reflection of the reflective layer 162 . It may be greater than the degree of relaxation of the characteristic.

On the other hand, in the combination (C3) of the above one R, G, B, W color filter (172R-2, 172G-2, 172B-2, 172W-2), the R color filter (172R-2) and the G color filter ( 172G-2) may be implemented by changing the location. In this case, the area of the B color filter 172B-2 is larger than the area of the R color filter 172R-2 and the area of the G color filter 172G-2, and the area of the R color filter 172R-2 is It becomes wider than the area of the G color filter 172G-2, so that the relaxation degree of the yellowish reflection characteristic of the reflective layer 162 may be greater than the relaxation degree of the reddish reflection characteristic of the reflection layer 162. have.

19 is a plan view illustrating a color filter structure of a reflective liquid crystal display according to another exemplary embodiment.

The reflective liquid crystal display 14 according to another embodiment of the present invention has color filters 172R-4, 172G-4, and 172B- compared to the reflective liquid crystal display 10 described above with reference to FIGS. 1 to 4 . 4, 172W-4) The configuration is different, and other configurations are the same or similar. Hereinafter, differences will be mainly described except for overlapping parts.

In the present embodiment, the color filters 172R-4, 172G-4, 172B-4, and 172W-4 include the R (red) color filter 172R-4, the G (green) color filter 172G-4, and the B ( A blue) color filter 172B-4 and a W (white) color filter 172W-4 may be included. Each of the R, G, B, and W color filters 172R-4, 172G-4, 172B-4, and 172W-4 may be disposed to overlap one or two or more pixels, respectively.

In the embodiment of FIG. 19 , the color filters 172R-4, 172G-4, 172B-4, and 172W-4 include the R color filter 172R-4 and the B color filter 172B-4 when viewed from a plan view. It may be arranged alternately and repeatedly in the same row. In a column different from the above column, the G color filter 172G-4 and the W color filter 172W-4 may be alternately and repeatedly disposed. The combination C4 of one of the R, G, B, and W color filters 172R-4, 172G-4, 172B-4, and 172W-4 may have a quadrangular shape when viewed from a plan view. The above one R, G, B, and W color filters 172R-4, 172G-4, 172B-4, and 172W-4 may be alternately and repeatedly arranged in a combination unit. Specifically, the above one R, G, B, and W color filters 172R-4, 172G-4, 172B-4, and 172W-4 may be repeatedly arranged in the row direction in a unit of combination. A combination (C4) of one of the above R, G, B, and W color filters (172R-4, 172G-4, 172B-4, 172W-4) and the other R, G disposed above and below it adjacent thereto The combination of , B, and W color filters 172R-4, 172G-4, 172B-4, and 172W-4 may be alternately disposed as shown in FIG. 19 . However, the arrangement of the above R, G, B, W color filter (172R-4, 172G-4, 172B-4, 172W-4) combination shown in FIG. 19 is exemplary, and the present invention is also Of course, it can be applied.

When viewed from a plan view, in the combination (C4) of one of the above R, G, B, and W color filters (172R-4, 172G-4, 172B-4, 172W-4), the B color filter (172B-4) The area and the area of the W color filter 172W - 4 may be larger than the area of the R color filter 172R - 4 and the area of the G color filter 172G - 4 . When viewed from a plan view, in the combination (C3) of one of the above R, G, B, and W color filters (172R-4, 172G-4, 172B-4, 172W-4), the B color filter (172B-4) The area and the area of the W color filter 172W - 4 may be the same. When viewed from a plan view, in the combination (C3) of one of the above R, G, B, and W color filters (172R-4, 172G-4, 172B-4, 172W-4), the R color filter (172R-4) The area and the area of the G color filter 172G - 4 may be the same.

The area ratio of the R, G, B, and W color filters 172R-4, 172G-4, 172B-4, and 172W-4 may be determined in consideration of the reflection characteristics of the reflective layer 162 . For example, the area ratio of the R, G, B, and W color filters 172R-4, 172G-4, 172B-4, and 172W-4 may be approximately 0.8:0.8:1.2:1.2. That is, as the area of the B color filter 172B-4 is relatively increased, the area of the R color filter 172R-4 may be relatively small, and as the area of the W color filter 172W-4 is relatively widened, The area of the G color filter 172G - 4 may be relatively small. As shown in FIG. 1 , when the pixel electrode 192 has a constant/uniform size regardless of the size of each color filter 172R-4, 172G-4, 172B-4, 172W-4, color B The filter 172B-4 may be implemented in an extended form to a pixel area corresponding to the R color filter 172R-4, and the W color filter 172W-4 may correspond to the G color filter 172G-4. It may be implemented in a form extended to the pixel area. Accordingly, the B color filter 172B-4 may have a structure overlapping with at least a portion of the thin film transistor corresponding to the R color filter 172R-4, and the W color filter 172W-4 may have a G color filter 172G- It may have a structure overlapping with at least a portion of the thin film transistor corresponding to 4). Also, the B color filter 172B-4 has a gate disposed between the pixel electrode 192 corresponding to the B color filter 172B-4 and the pixel electrode 192 corresponding to the R color filter 172R-4. It may have a structure overlapping the line 102 , and the W color filter 172W - 4 is a pixel electrode 192 corresponding to the W color filter 172W - 4 and a pixel corresponding to the G color filter 172G - 4 . It may have a structure overlapping the gate line 102 disposed between the electrodes 192 .

19 , the R color filter 172R-4 and the B color filter 172B-4 may not have an opening. Contrary to this, the B color filter 172B-4 and the W color filter 172W-4 further include an opening for connection between the pixel electrode 192 and the drain electrode 136 of an adjacent pixel, and thus include two openings. can do.

As in the embodiment of FIG. 19 , when the area of the R color filter 172R-4 and the area of the G color filter 172G-4 are the same, the R color filter 172R-4 and the G color filter 172G-4 ) abutting on the overlapping region of the data line 132 disposed between the pixel electrode 192 corresponding to the R color filter 172R-4 and the pixel electrode 192 corresponding to the G color filter 172G-4. can be a structure.

As in the embodiment of FIG. 19 , when the area of the B color filter 172B-4 and the area of the W color filter 172W-4 are the same, the B color filter 172R-4 and the W color filter 172W-4 ) abuts in the overlapping region of the data line 132 disposed between the pixel electrode 192 corresponding to the B color filter 172B-4 and the pixel electrode 192 corresponding to the W color filter 172W-4. can be a structure.

The reflective layer 162 of the reflective liquid crystal display 14 may have reddish and yellowish reflective characteristics compared to white paper. Accordingly, it is possible to give the user a different feeling from looking at the paper. As shown in FIG. 19 , the area of the B color filter 172B-4 is the area of the R color filter 172R-4, and the G color filter ( 172G-4), the reddish and yellowish reflective characteristics of the reflective layer 162 can be alleviated, so that a color similar to that of actual paper can be realized.

In the reflection type liquid crystal display 14 according to the present embodiment, the area of the B color filter 172B-4 is larger than the area of the R color filter 172R-4 and the area of the G color filter 172G-4. In the reflective liquid crystal display 10 described above with reference to FIGS. 1 to 4 , the area of the B color filter 172B is larger than the area of the R color filter 172R and the area of the G color filter 172G. Since it is larger than the degree, the degree of relaxation of the reddish and yellowish reflection characteristics of the reflective layer 162 may be relatively greater.

20 is a plan view illustrating a color filter structure of a reflective liquid crystal display according to another exemplary embodiment of the present invention.

The reflective liquid crystal display 16 according to another embodiment of the present invention has color filters 172R-6, 172G-6, and 172B- compared to the reflective liquid crystal display 10 described above with reference to FIGS. 1 to 4 . 6, 172W-6) The configuration is different, and other configurations are the same or similar. Hereinafter, differences will be mainly described except for overlapping parts.

In the present embodiment, the color filters 172R-6, 172G-6, 172B-6, and 172W-6 include the R (red) color filter 172R-6, the G (green) color filter 172G-6, and the B ( a blue) color filter 172B-6, and a W (white) color filter 172W-6. Each of the R, G, B, and W color filters 172R-6, 172G-6, 172B-6, and 172W-6 may be disposed to overlap one or two or more pixels, respectively.

In the embodiment of FIG. 20 , the combination C5 of one R, G, B, and W color filter 172R-6, 172G-6, 172B-6, 172W-6 may have a rectangular shape when viewed from a plan view. have. The above single R, G, B, and W color filters 172R-6, 172G-6, 172B-6, and 172W-6 may be alternately and repeatedly disposed in a combination unit. Specifically, the above one R, G, B, and W color filters 172R-6, 172G-6, 172B-6, and 172W-6 may be repeatedly arranged in the row direction in a unit of combination. A combination (C5) of one of the above R, G, B, and W color filters (172R-6, 172G-6, 172B-6, 172W-6) and the other R, G disposed above and below it adjacent thereto The combination of , B, and W color filters 172R-6, 172G-6, 172B-6, and 172W-6 may be alternately disposed as shown in FIG. 20 . However, the arrangement of the above R, G, B, W color filter (172R-6, 172G-6, 172B-6, 172W-6) combination shown in FIG. Of course, it can be applied.

When viewed from a plan view, in the combination (C5) of one of the above R, G, B, and W color filters (172R-6, 172G-6, 172B-6, 172W-6), the B color filter (172B-6) The area may be larger than the area of the R color filter 172R-6, the area of the G color filter 172G-6, and the area of the W color filter 172W-6. When viewed from a plan view, the area of the R color filter 172R-6, the area of the G color filter 172G-6, and the area of the W color filter 172W-6 may be partially/all the same or partially/all different. can

The area ratio of the R, G, B, and W color filters 172R-6, 172G-6, 172B-6, and 172W-6 may be determined in consideration of the reflection characteristics of the reflective layer 162 . For example, the area ratio of the R, G, B, and W color filters 172R-6, 172G-6, 172B-6, and 172W-6 may be approximately 0.8:0.9:1.5:0.8. That is, the area of the R color filter 172R-6, the area of the G color filter 172G-6, and the area of the W color filter 172W-6 are as large as the area of the B color filter 172B-6 is relatively increased. This can be small. As shown in FIG. 1 , when the pixel electrode 192 has a constant/uniform size irrespective of the size of each color filter 172R-6, 172G-6, 172B-6, 172W-6, color B The filter 172B-6 may be implemented in an extended form into pixel areas corresponding to each of the R color filter 172R-6, the G color filter 172G-6, and the W color filter 172W-6. Accordingly, the B color filter 172B-6 overlaps at least a portion of the thin film transistor corresponding to the R color filter 172R-6, the G color filter 172G-6, and the W color filter 172W-6. can be In addition, the B color filter 172B-6 is a gate line ( 102 ) and the data line 132 may be overlapped.

20 , in the R color filter 172R-6, an opening for connecting the pixel electrode 192 and the drain electrode 136 is not formed, and the opening is formed in the B color filter 172B-6. can be Accordingly, the B color filter 172B-6 may include two openings for connection between the pixel electrode 192 and the drain electrode 136 .

The reflective layer 162 of the reflective liquid crystal display 16 may have reddish and yellowish reflective characteristics compared to white paper. Accordingly, it is possible to give the user a different feeling from looking at the paper. As shown in FIG. 20 , the area of the B color filter 172B-6 is the area of the R color filter 172R-6, and the G color filter ( 172G-6), the reddish and yellowish reflective properties of the reflective layer 162 can be alleviated, so that a color similar to that of actual paper can be realized.

In some embodiments, the color filter may be implemented including an R (red) color filter, a G (green) color filter, a B (blue) color filter, and a W (white) color filter. However, this is exemplary and may be implemented by including only the R color filter, the G color filter, and the B color filter without including the W color filter.

21 is a layout diagram of a reflective liquid crystal display according to another exemplary embodiment. 22 is a plan view illustrating a structure of a color filter of a reflective liquid crystal display according to another exemplary embodiment of the present invention.

The reflective liquid crystal display 20 according to another embodiment of the present invention has a different configuration of color filters 174R, 174G, and 174B than the reflective liquid crystal display 10 described above with reference to FIGS. 1 to 4 . and other configurations are the same or similar. Hereinafter, differences will be mainly described except for overlapping parts.

In this embodiment, the color filters 174R, 174G, and 174B may include an R (red) color filter 174R, a G (green) color filter 174G, and a B (blue) color filter 174B. Each of the R, G, and B color filters 174R, 174G, and 174B may be disposed to overlap one or two or more pixels, respectively. The color filters 174R, 174G, and 174B may include openings for connection between the pixel electrode 192 and the drain electrode 136 .

In the present embodiment, the color filters 174R, 174G, and 174B repeatedly alternate in sequence in the same row as the R color filters 174R, G color filters 174G, and B color filters 174B when viewed from a plan view. can be placed. Each of the R color filter 174R, the G color filter 174G, and the B color filter 174B may be sequentially disposed in the column direction. The combination C6 of one R, G, and B color filter 174R, 174G, and 174B may have a quadrangular shape when viewed from a plan view. The above one R, G, and B color filters 174R, 174G, and 174B may be alternately and repeatedly disposed in a unit of combination. Specifically, the above one R, G, and B color filters 174R, 174G, and 174B may be repeatedly arranged in the row and column directions as a combination unit. However, the arrangement of the combination of the R, G, and B color filters 174R, 174G, and 174B shown in FIG. 22 is exemplary, and it goes without saying that the present invention may be applied to various other arrangements.

When viewed from a plan view, the area of the B color filter 174B in the combination C6 of one of the R, G, and B color filters 174R, 174G, and 174B is the area of the R color filter 174R, and the G color It may be wider than the area of the filter 174G. When viewed from a plan view, the area of the R color filter 174R may be larger than that of the G color filter 174G.

The area ratio of the R, G, and B color filters 174R, 174G, and 174B may be determined in consideration of the reflection characteristics of the reflective layer 162 . For example, the area ratio of the R, G, and B color filters 174R, 174G, and 174B may be approximately 1:0.8:1.2. That is, as the area of the B color filter 174B is relatively increased, the area of the G color filter 174G may be relatively small. As shown in FIG. 21 , when the pixel electrode 192 has a constant/uniform size irrespective of the size of each color filter 174R, 174G, and 174B, the B color filter 174B is the G color filter 174G. ) may be implemented in an extended form to the pixel area corresponding to the . Accordingly, the B color filter 174B overlaps the data line 132 disposed between the pixel electrode 192 corresponding to the B color filter 174B and the pixel electrode 192 corresponding to the G color filter 174G. It may be a structure that becomes

In the present embodiment, the R color filter 174R and the G color filter 174G are disposed between the pixel electrode 192 corresponding to the R color filter 174R and the pixel electrode 192 corresponding to the G color filter 174G. It may have a structure in which the disposed data lines 132 contact each other in the overlapping region.

The reflective layer 162 of the reflective liquid crystal display 20 may have reddish and yellowish reflective characteristics compared to white paper. Accordingly, it is possible to give the user a different feeling from looking at the paper. As shown in FIG. 22 , the area of the B color filter 174B is the area of the R color filter 174R and the area of the G color filter 174G. As it has a wider structure, the reddish and yellowish reflective characteristics of the reflective layer 162 may be alleviated, and thus a color similar to that of actual paper may be realized.

In particular, as shown in FIG. 22 , the area of the B color filter 174B is larger than the area of the R color filter 174R and the area of the G color filter 174G, and the area of the R color filter 174R is the G color. When the filter 174G is implemented to be wider than the area of the filter 174G, the relaxation degree of the yellowish reflection characteristic of the reflective layer 162 may be greater than the relaxation degree of the reddish reflection characteristic of the reflection layer 162 .

Meanwhile, in the combination C6 of the above one R, G, and B color filters 174R, 174G, and 174B, the positions of the R color filter 174R and the G color filter 174G may be changed to be implemented. In this case, the area of the B color filter 174B is larger than the area of the R color filter 174R and the area of the G color filter 174G, and the area of the G color filter 174G is the area of the R color filter 174R. As it becomes wider, the relaxation degree of the reddish reflection characteristic of the reflective layer 162 may be greater than the relaxation degree of the yellowish reflection characteristic of the reflection layer 162 .

23 is a plan view illustrating a structure of a color filter of a reflective liquid crystal display according to another exemplary embodiment of the present invention.

The reflective liquid crystal display 22 according to another embodiment of the present invention has color filters 174R-2, 174G-2, and 174B compared to the reflective liquid crystal display 20 described above with reference to FIGS. 21 and 22 . -2) The configuration is different, and the other configurations are the same or similar. Hereinafter, differences will be mainly described except for overlapping parts.

In this embodiment, the color filters 174R-2, 174G-2, and 174B-2 are an R (red) color filter 174R-2, a G (green) color filter 174G-2, and a B (blue) color filter. A filter 174B-2 may be included. Each of the R, G, and B color filters 174R-2, 174G-2, and 174B-2 may be disposed to overlap one or more pixels, respectively. The color filters 174R - 2 , 174G - 2 , and 174B - 2 may include openings for connection between the pixel electrode 192 and the drain electrode 136 .

In the present embodiment, the color filters 174R-2, 174G-2, and 174B-2 are the R color filter 174R-2, the G color filter 174G-2, and the B color filter 174B when viewed from a plan view. -2) may be repeatedly arranged alternately in the same row. Each of the R color filter 174R-2, the G color filter 174G-2, and the B color filter 174B-2 may be sequentially disposed in the column direction. The combination C7 of one R, G, and B color filter 174R-2, 174G-2, and 174B-2 may have a quadrangular shape when viewed from a plan view. The above one R, G, and B color filters 174R-2, 174G-2, and 174B-2 may be alternately and repeatedly disposed in a combination unit. Specifically, the above single R, G, and B color filters 174R-2, 174G-2, and 174B-2 may be repeatedly disposed in the row and column directions as a combination unit. However, the arrangement of the combination of the R, G, and B color filters 174R-2, 174G-2, and 174B-2 shown in FIG. 23 is exemplary, and it goes without saying that the present invention can be applied to various other arrangements. .

When viewed from a plan view, the area of the B color filter 174B-2 in the combination C6 of the above one R, G, and B color filters 174R-2, 174G-2, 174B-2 is equal to the area of the R color filter ( The area of 174R-2 and the area of the G color filter 174G-2 may be larger. When viewed from a plan view, the area of the R color filter 174R-2 and the area of the G color filter 174G-2 may be the same.

The area ratio of the R, G, and B color filters 174R-2, 174G-2, and 174B-2 may be determined in consideration of the reflection characteristics of the reflective layer 162 . For example, the area ratio of the R, G, and B color filters 174R-2, 174G-2, and 174B-2 may be approximately 0.9:0.9:1.2. That is, as the area of the B color filter 174B-2 is relatively increased, the area of the R color filter 174R-2 and the G color filter 174G-2 may be relatively small. As shown in FIG. 21 , when the pixel electrode 192 has a constant/uniform size irrespective of the size of each color filter 174R-2, 174G-2, 174B-2, the B color filter 174B- 2) may be implemented in an extended form to a pixel area corresponding to the G color filter 174G-2. Accordingly, the B color filter 174B-2 is provided with data disposed between the pixel electrode 192 corresponding to the B color filter 174B-2 and the pixel electrode 192 corresponding to the G color filter 174G-2. It may have a structure overlapping the line 132 .

In the present embodiment, the G color filter 174G-2 is disposed between the pixel electrode 192 corresponding to the G color filter 174G-2 and the pixel electrode 192 corresponding to the R color filter 174R-2. It may have a structure overlapping at least a portion of the data line 132 .

The reflective layer 162 of the reflective liquid crystal display 20 may have reddish and yellowish reflective characteristics compared to white paper. Accordingly, it is possible to give the user a different feeling from looking at the paper. As shown in FIG. 23 , the area of the B color filter 174B-2 is the area of the R color filter 174R-2, and the G color filter ( 174G-2), the reddish and yellowish reflective characteristics of the reflective layer 162 can be alleviated, so that a color similar to that of actual paper can be realized.

In the above, the embodiments of the present invention have been mainly described, but these are merely examples and do not limit the present invention, and those of ordinary skill in the art to which the present invention pertains within a range that does not depart from the essential characteristics of the embodiments of the present invention. It will be appreciated that various modifications and applications not exemplified above are possible. For example, each component specifically shown in the embodiment of the present invention may be implemented by modification. And differences related to such modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

100: first substrate
200: second substrate
300: liquid crystal layer
102: gate line
104: gate electrode
112: gate insulating film
122: semiconductor layer
124: ohmic contact layer
132: data line
134: source electrode
136: drain electrode
142: first protective layer
152: first organic layer
162: reflective layer
172R, 172G, 172B, 172W, 174R, 174G, 174B: color filter
182: second organic layer
192: pixel electrode
202: common electrode
212: light blocking member
214: column spacer

Claims (20)

a first substrate and a second substrate facing each other;
a plurality of gate lines and a plurality of data lines disposed on the first substrate and arranged to cross each other to define a unit pixel;
a plurality of thin film transistors connected to any one of the plurality of gate lines and any one of the plurality of data lines, the plurality of thin film transistors being disposed for each unit pixel;
a first insulating layer disposed on the gate line and the data line;
a color filter disposed on the first insulating layer; and
a plurality of pixel electrodes respectively disposed on the first insulating layer for each of the unit pixels;
the color filter includes a red color filter, a green color filter, and a blue color filter, and an area of the blue color filter is larger than an area of the red color filter and an area of the green color filter;
The unit pixel includes first and second pixels disposed adjacent to each other;
A first thin film transistor for driving the pixel electrode of the first pixel is disposed in the first pixel;
A second thin film transistor for driving the pixel electrode of the second pixel is disposed in the second pixel;
The blue color filter is disposed in the first pixel to overlap the first thin film transistor, and the blue color filter is disposed to extend from the first pixel to the second pixel and further overlaps the second thin film transistor. According to claim 1,
The unit pixel defined by the plurality of gate lines and the plurality of data lines has a uniform size. According to claim 1,
The display device further comprising a liquid crystal layer disposed between the first substrate and the second substrate. According to claim 1,
The area of the red color filter and the area of the green color filter are the same. According to claim 1,
The color filter further comprises a white color filter,
An area of the blue color filter is larger than an area of the white color filter. 6. The method of claim 5,
An area of the red color filter and an area of the green color filter are larger than an area of the white color filter. According to claim 1,
The color filter further comprises a white color filter,
An area of the blue color filter is the same as an area of the white color filter. According to claim 1,
The color filter further comprises a white color filter,
the red color filter, the green color filter, the blue color filter, and the white color filter are arranged in two rows and two columns;
A display device in which the blue color filter and the white color filter are disposed in the same row. According to claim 1,
Further comprising a reflective layer and a second insulating film,
The reflective layer is disposed on the first insulating layer, the color filter is disposed on the reflective layer, and the second insulating layer is disposed on the color filter. According to claim 1,
Further comprising a light blocking member disposed on the second substrate,
The light blocking member is disposed in an area corresponding to a boundary of the color filter. According to claim 1,
A reflective layer disposed on the first insulating layer, and a common electrode disposed on the second substrate,
The common electrode is electrically connected to the reflective layer,
The display device is a reflective display device. A plurality of gate lines and a plurality of data lines intersecting each other on a first substrate to define a unit pixel, and a plurality of thin film transistors connected to one of the plurality of gate lines and any one of the plurality of data lines, the plurality of thin film transistors comprising: forming a plurality of thin film transistors arranged for each unit pixel;
forming a first insulating layer disposed on the gate line and the data line;
forming a color filter on the first insulating layer; and
Comprising the step of forming a plurality of pixel electrodes respectively arranged for each of the unit pixels on the first insulating film,
the color filter includes a red color filter, a green color filter, and a blue color filter, and an area of the blue color filter is larger than an area of the red color filter and an area of the green color filter;
The unit pixel includes first and second pixels disposed adjacent to each other;
A first thin film transistor for driving the pixel electrode of the first pixel is disposed in the first pixel;
A second thin film transistor for driving the pixel electrode of the second pixel is disposed in the second pixel;
The blue color filter is disposed in the first pixel to overlap the first thin film transistor, and the blue color filter is disposed to extend from the first pixel to the second pixel and further overlaps the second thin film transistor. 13. The method of claim 12,
The unit pixel defined by the plurality of gate lines and the plurality of data lines has a uniform size. 13. The method of claim 12,
The display device is a reflective display device. 13. The method of claim 12,
The color filter further comprises a white color filter,
An area of the blue color filter is larger than an area of the white color filter. 13. The method of claim 12,
Before forming the color filter, further comprising the step of forming a reflective layer on the first insulating film,
After forming the color filter, the manufacturing method of the display device further comprising the step of forming a second insulating layer on the color filter. 17. The method of claim 16,
The forming of the plurality of pixel electrodes is performed after forming the second insulating layer. 13. The method of claim 12,
forming a common electrode on a second substrate; and
Further comprising the step of forming a light blocking member on the common electrode,
The light blocking member is formed in an area corresponding to a boundary of the color filter. 19. The method of claim 18,
The manufacturing method of the display device further comprising the step of forming a column spacer on the light blocking member. 20. The method of claim 19,
The method of manufacturing a display device, wherein the light blocking member and the column spacer are integrally formed.

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